APOD250928 火星上的神秘豹纹:岩石斑点之谜
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图像提供: NASA[1], JPL-Caltech[2], MSSS[3], Perseverance Rover[4]
英文原文:Explanation: What is creating these unusual spots? Light-colored spots on Martian rocks , each surrounded by a dark border, were discovered last year by NASA 's Perseverance Rover currently exploring Mars . Dubbed leopard spots because of their seemingly similarity to markings on famous Earth-bound predators , these curious patterns are being studied with the possibility they were created by ancient Martian life . The pictured spots measure only millimeter s across and were discovered on a larger rock named Cheyava Falls . The exciting but unproven speculation is that long ago, microbe s generated energy with chemical reactions that turned rock from red to white while leaving a dark biosignature ring, like some similarly appearing spots on Earth rocks . Although other non-biological explanations have not been ruled out, speculation focusing on this potential biological origin is causing much intrigue . 说明: 这些不寻常的斑点是怎么形成的呢? 去年,美国太空总署(NASA)的「NASA[5]的毅力号[6]」探测车在火星[7]上发现了一些岩石上的浅色斑点,每个斑点周围都有深色边框。 由于外观和地球上著名掠食者[8]身上的花纹[9]相似,因此暱称它们为「豹纹斑」。 科学家们正在深入研究这些神秘的斑点,其中一种可能的解释是它们源自远古的火星生命[10]。 照片[11]中的斑点仅有毫米[12]大小,出现在一块被命名为「Cheyava Falls[13]」的大岩石[14]上。 令人振奋但尚未证实的推测是:很久以前,微生物[15]或许通过化学反应获取能量,使岩石由红转白,同时留下深色的「生物签名」环,就像地球上一些岩石[16]中也能见到类似[17]的痕迹。 虽然非生物学解释[18]并未被排除,但这种潜在的生物起源假说,已经引起了相当大的关注[19]。
明日的图片: comet comet[20]
Authors & editors: Robert Nemiroff[21] (MTU[22]) & Jerry Bonnell[23] (UMCP[24])
NASA Official: Amber Straughn Specific rights apply[25].
NASA Web Privacy[26], Accessibility[27], Notices[28];
A service of: ASD[29] at NASA[30] / GSFC[31],
NASA Science Activation[32]
& Michigan Tech. U.[33]
太空天文实验室(成功大学物理系)
编辑:林昱丞[34]
[4]https://science.nasa.gov/mission/mars-2020-perseverance/
[6]https://science.nasa.gov/mission/mars-2020-perseverance/
[7]https://science.nasa.gov/mars/
[8]https://img.freepik.com/premium-photo/front-view-kitten-hunting-pose_7502-2520.jpg
[9]https://en.wikipedia.org/wiki/Leopard#/media/File:African_leopard_male_(cropped).jpg
[10]https://science.nasa.gov/blogs/was-there-life-on-mars/
[11]https://science.nasa.gov/resource/perseverance-finds-a-rock-with-leopard-spots/
[12]https://www.quora.com/What-is-something-the-size-of-a-millimeter
[13]https://youtu.be/bknMDwCjFHo
[14]https://www.flickr.com/photos/lunexit/53885766401/in/pool-apods/
[15]https://en.wikipedia.org/wiki/Microorganism
[16]https://www.atlasobscura.com/articles/earliest-life-on-earth-rocks
[17]https://www.geocaching.com/geocache/GC3T4BT
[18]https://en.wikipedia.org/wiki/Hematite#Mars
[19]https://www.nasa.gov/news-release/nasa-says-mars-rover-discovered-potential-biosignature-last-year/
[20]http://apod.nasa.gov/apod/ap250929.html
[21]http://www.phy.mtu.edu/faculty/Nemiroff.html
[23]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[25]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[26]https://www.nasa.gov/about/highlights/HP_Privacy.html
[27]https://www.nasa.gov/general/accessibility/
[28]https://www.nasa.gov/privacy/
[29]https://astrophysics.gsfc.nasa.gov/
[31]https://www.nasa.gov/centers/goddard/
[32]https://science.nasa.gov/learners
[34]http://apod.nasa.gov/apod/l28091033@gs.ncku.edu.tw
http://apod.nasa.gov/apod/ap250928.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap250928.html
